Update documentation links from GitHub Pages to GitHub.com

[pelikhan]

Change all references in the documentation from the GitHub Pages URL to the GitHub.com URL for consistency and accuracy.

[Copilot]

Pull request overview

This PR updates all documentation URL references from the GitHub Pages URL (github.github.io/gh-aw) to the GitHub.com URL (github.github.com/gh-aw) for consistency. This appears to be a documentation infrastructure migration where the documentation hosting is moving from GitHub Pages to GitHub.com.

Changes:

• Updated 200+ documentation URL references across the codebase
• Changed URL pattern from https://github.github.io/gh-aw/* to https://github.github.com/gh-aw/*
• Updated URLs in markdown files, code, tests, configuration files, social media content, and log files

Reviewed changes

Copilot reviewed 74 out of 75 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
socials/published/*.json	Updated blog post URLs in published social media content for 4 campaign days
socials/content/*.md	Updated blog URLs in social media content templates for 4 posts
docs/src/content/docs/blog/*.md	Updated documentation links in 19 blog posts
docs/src/content/docs/setup/quick-start.md	Updated Quick Start guide links
docs/src/content/docs/reference/frontmatter-full.md	Updated strict mode documentation reference
pkg/workflow/*.go	Updated documentation URLs in Go source code (validation, engines, compiler)
pkg/cli/*.go	Updated CLI help text documentation links
pkg/parser/schemas/*.json	Updated schema documentation comments
cmd/gh-aw/main.go	Updated CLI help footer documentation link
actions/setup/js/*.cjs	Updated JavaScript action documentation URLs
.github/workflows/*.md	Updated workflow documentation references
.github/aw/*.md	Updated workflow template documentation links
.github/agents/*.agent.md	Updated agent documentation references
README.md, CHANGELOG.md, install.md	Updated documentation links in project root files
slides/index.md, docs/slides/index.md	Updated presentation documentation links
scratchpad/*.md	Updated scratchpad documentation references
skills/*.md	Updated skill documentation references
socials/campaign.log	Updated URLs in campaign log entries

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